Cracks in buttercream

Hello, I was wondering if anyone could tell me why I get cracks in my buttercream icing. I ice my cakes and put the decorations on while the buttercream is still soft (so the decor will stick). The cake looks great and then when I am ready to deliver it the next day, while traveling or just moving the cake to my van, the icing cracks. I have 3 or 4 cake boards and it is plenty sturdy. I use crisco, water, powdered sugar and flavors for my recipe. Please help me as this is so frustrating because I never know when or where the cracks are going to show up. Thank you!

AI'm not really sure why it happens, but I know the topic has been discussed and I think there may have been an answer or two in there. If you go to the search function and type in "icing cracks" you skills find a couple threads on the info

it can have to do with your ingredient ratios and/or your cake board sturdiness. As morganchampagne said, it has been discussed in other threads. You can search for the topic and I'm sure you'll find some helpful info in previous discussions. Good luck.